Hex key portion



FIG. 1 is a perspective view of a hex key portion showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict portions of the hex key portion in which the design is embodied that are not considered part of the claimed design. 

CLAIM The ornamental design for a hex key portion, as shown and described. 